Help on RESTful design and URL

I’m developing blog/CMS application and I’m considering if I should
use RESTful design for my app.

map.resources will create “blog/1/item/2” type URLs, but it doesn’t
seam pretty. I searched on the Web and found the way to change them to
“blog/myblog/item/thisitemname” type URLs. But it isn’t enough. I want
make them like “myblog/thisitemname”.

How can I do it on RESTful Rails (I’m currently using Rails 1.2.3).